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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
IKO Roofing Company in Los Angeles: What to Know First
We repair and replace IKO roofs across Los Angeles as an independent IKO service provider, which means we’re not tied to any manufacturer’s script when we tell you what your roof actually needs. Most IKO repair calls in LA are diagnosed and fixed within one to two days once we’re on site, and every single job starts with a written price before any work begins. You’ll never get a vague verbal estimate from us, and repairs on IKO shingles typically run $350 to $850 depending on what’s failing up there. If you own an IKO roof and something’s not right, call (213) 521-8272 and a live person answers, day or night.
This page is written for IKO roof owners in Los Angeles who want straight answers: what actually fails on these roofs, what it costs to fix, and whether it’s worth putting more money into an older IKO system or replacing it entirely.
How IKO Products Fail – and How We Fix Them
IKO makes solid shingles, but every brand has patterns. Here’s what we see repeatedly on Los Angeles roofs, and what we do about it.
- Cambridge architectural shingles losing granules faster than expected in full sun. In neighborhoods like Northridge and Woodland Hills where roofs bake all day, IKO Cambridge shingles from certain production years shed granules more aggressively than comparable GAF or Owens Corning lines. Granule loss thins the asphalt layer, which then cracks under UV. We inspect the full slope, measure granule loss per square foot, and either spot-replace damaged courses or recommend a full re-roof if the shingles are beyond saving.
- Marathon Plus AM sealant strips losing adhesion on steep pitches. The Marathon Plus AM line uses a wider adhesive strip than standard shingles, which is great until LA’s heat-and-cool cycles cause partial lifting on slopes steeper than 6:12. Homeowners in Echo Park and Mount Washington see this most. We re-seal lifted tabs with IKO-compatible adhesive and add mechanical fastening where the seal keeps failing, so you’re not chasing the same tab year after year.
- Crowne Slate and Royal Estate profiles cracking at the nail line. These heavier laminated lines look sharp, but when a previous installer overdriven nails or placed them in the wrong part of the shingle, stress cracks form right at the nail pattern. The crack is rarely visible from the ground. We find them with a full hands-on inspection, remove the fractured shingles, and replace them properly with the right nail placement and depth so the repair holds.
- Valley flashing failures around IKO’s heavier profiles. Thicker shingles like Crowne Slate need wider valley metal and proper underlayment transitions. When a roof was originally done with standard 24-inch valley flashing, the heavier shingle profile traps water at the edges and the flashing corrodes early. We rebuild valleys to match IKO’s installation specs, which often means widening the metal and re-laying the underlayment up both sides.
- Decking rot hidden beneath IKO’s strip shingle lines. Older IKO Marathon installations in Los Angeles were sometimes put down over existing layers, which means decking problems hid under a second layer for years. When we pull back shingles and find rotten sheathing, we replace the decking section before reinstalling, because a new shingle over bad wood is just a receipt for another failure. This is where our written price matters: we show you the rot, explain the fix, and get approval before we touch it.
Styles & brands we work with






Our IKO Roofing Company Process
When you call us about an IKO roof, here’s what actually happens, from the first phone call to the final walkthrough.
- 1
You call (213) 521-8272. A live person answers, takes down what you’re seeing, and schedules a visit. Before our technician arrives, you get their name and photo texted or emailed to you, so you know exactly who’s at your door.
- 2
Hands-on inspection. The technician walks the roof, checks the specific IKO line installed, and looks for the failure patterns listed above plus anything else that’s wrong. You get a plain-English explanation of what they found, with photos if you want them.
- 3
Written price. Before any work starts, you get a written quote that breaks out materials, labor, and what’s included. No change orders, no invoice surprises. If the fix involves OEM IKO shingles versus a quality color-matched alternative, we explain the price difference and warranty implications.
- 4
The repair or replacement. We use manufacturer-recognized installation practices for IKO products, whether that means matching the specific shingle line, correcting ventilation issues, or rebuilding a valley the way IKO’s spec sheet says to. For repairs, we work clean and keep the upper slopes protected.
- 5
The test. We water-test repaired areas where practical, double-check flashing and sealant, and photograph the finished work. You see the result, not just a bill.
- 6
Written guarantee. Every repair comes with a 365-day guarantee in writing. If the repair fails within a year, we come back and fix it at no charge. The second visit is on us.
What IKO Roofing Company Costs in Los Angeles
Here are honest ranges for the IKO work most Los Angeles homeowners call about. These are real numbers from actual jobs across the LA basin, from the Valley to San Pedro.
- Small IKO shingle repair (replacing 3-8 shingles, re-sealing tabs): $350 to $550
- Valley flashing rebuild on an IKO roof: $650 to $950
- Decking patch plus shingle replacement (one section): $800 to $1,400
- Full IKO roof replacement (1,800 square feet, single story, tear-off included): $13,500 to $19,000 depending on profile, pitch, and decking condition
What moves the price most is decking condition, roof pitch, and whether you have a single layer or multiple layers to tear off. Steeper roofs cost more because they’re slower and safer, never slower without reason. Call (213) 521-8272 for a written, exact quote on your IKO roof. Estimates are free.
See the difference
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After
Before
After
Before
AfterWhy Los Angeles Homeowners Call Mercer Roofing Co Los Angeles for IKO Work
We’re not the biggest roofing company in Los Angeles. We’re the one that treats your home like it’s yours, not a job site. Every technician we send arrives in a clean, marked uniform with a photo ID badge, and their name and photo are sent to you before they ever ring the bell. That’s the Threshold Verified standard, and every Mercer location is contractually held to it.
We’ve been doing this since 2000, founded as part of the Threshold Group family of home-service companies. Grant Whitlock grew up in Eagle Rock and trained in the building trades program at Los Angeles Trade-Technical College, so when he talks about your IKO roof, it’s from two decades of hands-on work across the LA basin, not a sales script. We install and repair using IKO plus GAF, Owens Corning, and CertainTeed, so when a repair calls for a different profile or a discontinued color, we can match it without waiting weeks or forcing a bad fit. And every repair we make, IKO or otherwise, carries a 365-day written guarantee. If it’s not right within a year, we make it right.
FAQs
No. A repair done by a qualified independent contractor using IKO-compatible materials and proper installation methods does not void your IKO warranty. As an independent IKO service provider, we install to IKO’s stated application specs and document our work. If a specific repair involves non-OEM parts, we’ll tell you before any money changes hands and explain what it means for your coverage.
Call (213) 521-8272 and we can walk through what’s covered on your specific IKO line before you decide anything.
Most IKO lines are still in production, including Cambridge, Dynasty, Crowne Slate, and Royal Estate. Older or regional colors sometimes go out of production, and that’s when matching gets tricky. We keep relationships with Los Angeles suppliers who stock current IKO products, and where an exact color match isn’t available, we can blend from multiple bundles or use a complementary color that won’t stand out from the street.
Call (213) 521-8272 with the shingle color name and we can tell you same-day whether it’s still made.
Expect 18 to 25 years for standard IKO architectural shingles like Cambridge in Los Angeles, and 25 to 35 years for the heavier lines like Crowne Slate and Royal Estate if installed correctly and ventilated properly. LA’s dry heat is actually easier on shingles than humid climates, but full afternoon sun on south and west-facing slopes accelerates granule loss and sealant aging. In places like Encino or Sherman Oaks where trees shade part of the roof, the shaded areas sometimes hold moisture and grow moss, which shortens the roof’s life differently.
Call (213) 521-8272 and we’ll tell you honestly whether your IKO roof has years left or whether you’re buying time.
For active leaks or visible damage, we typically schedule a diagnostic visit within one to two days in most of Los Angeles. For non-urgent questions or a regular IKO roof inspection, we’ll work around your schedule. You’ll always get a live person on the phone, and you’ll always get a written price before any work begins.
Call (213) 521-8272 and tell us what’s going on. We’ll be straight with you about what we think it is and how soon it needs attention.
We do both. Full IKO tear-off and replacement is a significant part of our Los Angeles work, and we approach it the same way we approach a small repair: written price up front, no surprises on the invoice, and a written 365-day guarantee on the work. We’ll also tell you honestly if a repair is a better use of your money than a replacement right now. A roof should be the last thing on your mind, let’s keep it that way.
Call (213) 521-8272 for a free estimate on either.
Contact Mercer Roofing Co Los Angeles
If you own an IKO roof in Los Angeles and something doesn’t look or feel right, call us at (213) 521-8272. You’ll get a live person, a straight answer, and a written price before any work starts. We send every technician’s name and photo before they arrive, and they’ll badge in with a photo ID at your door. That’s how we’ve done it since 2000, and that’s how we’ll do it for your IKO roof.
Written by Grant Whitlock, Owner, Mercer Roofing Co at Mercer Roofing Co Los Angeles, serving Los Angeles and nearby areas.